/*
   Portions Copyright (c) 2009-10 Zepheira LLC, Some Rights Reserved
   Portions Copyright (c) 2010-11 Talis Inc, Some Rights Reserved

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

 */
package org.callimachusproject.engine.events;

import javax.xml.stream.Location;

/**
 * Assigns a namespace to a prefix in the document.
 * 
 * @author James Leigh
 *
 */
public class Namespace extends RDFEvent {
	private String prefix;
	private String namespaceURI;

	public Namespace(String prefix, String namespace) {
		super(null);
		assert prefix != null;
		assert namespace != null;
		this.prefix = prefix;
		this.namespaceURI = namespace;
	}

	public Namespace(String prefix, String namespace, Location location) {
		super(location);
		assert prefix != null;
		assert namespace != null;
		this.prefix = prefix;
		this.namespaceURI = namespace;
	}

	public String getPrefix() {
		return prefix;
	}

	public String getNamespaceURI() {
		return namespaceURI;
	}

	public boolean isDefaultNamespace() {
		return "".equals(prefix);
	}

	public String toString() {
		return "PREFIX " + prefix + ":<" + namespaceURI + ">";
	}

	@Override
	public int hashCode() {
		return namespaceURI.hashCode();
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Namespace other = (Namespace) obj;
		if (!namespaceURI.equals(other.namespaceURI))
			return false;
		if (!prefix.equals(other.prefix))
			return false;
		return true;
	}
}
